CBS.com has added more images from this weeks episode of The Big Bang Theory, "The Convention Conundrum", featuring guest stars Carrie Fisher and James Earl Jones. You can see more in the gallery below.

Preview:

Air Date: 01/25/14

After the guys can't get Comic-Con tickets, Sheldon tries to hold his own convention and winds up spending a wild night with James Earl Jones. Meanwhile, the girls see if they can act like "grown-ups," on The Big Bang Theory, Thursday, 8/7c. James Earl Jones and Carrie Fisher guest star.
(Source: CBS.com)

On the Golden Globes red carpet, TV Line learned from Big Bang executive producers Bill Prady and Steve Molaro, that both Carrie Fisher and James Earl Jones will be appearing on the show, as themselves, in an upcoming episode.

Update:TV Guide has posted some plot details about the episode, scheduled for Jan. 30th. According to executive producer Steven Molaro, Sheldon tries to track down James Earl Jones to be a panelist at a convention he tries to start up; Molaro also says that Carrie Fisher makes an "interesting" cameo.